EP1169569A1 - Circuit configuration for the starter of an automotive internal combustion engine - Google Patents

Circuit configuration for the starter of an automotive internal combustion engine

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Publication number
EP1169569A1
EP1169569A1 EP01911355A EP01911355A EP1169569A1 EP 1169569 A1 EP1169569 A1 EP 1169569A1 EP 01911355 A EP01911355 A EP 01911355A EP 01911355 A EP01911355 A EP 01911355A EP 1169569 A1 EP1169569 A1 EP 1169569A1
Authority
EP
European Patent Office
Prior art keywords
circuit
computer
arrangement according
starter
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01911355A
Other languages
German (de)
French (fr)
Other versions
EP1169569B1 (en
Inventor
Johannes Theisen
Martin Gruenewald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1169569A1 publication Critical patent/EP1169569A1/en
Application granted granted Critical
Publication of EP1169569B1 publication Critical patent/EP1169569B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2250/00—Problems related to engine starting or engine's starting apparatus
    • F02N2250/02—Battery voltage drop at start, e.g. drops causing ECU reset

Definitions

  • the invention is based on a circuit arrangement for controlling a starter relay of a starter for a motor vehicle internal combustion engine according to the preamble of the main claim.
  • a computer controls the starter current for turning on the starter after the contacts of a starter relay are closed (two-stage method).
  • the computer controls the voltage and / or the current or the switch-on time for the starter until the internal combustion engine starts.
  • this if there is a fault in the computer, which can occur in particular with an old and weak battery, for example also at low temperatures, this inevitably leads to the start relay dropping and thus to the undesired interruption of the starting process.
  • the internal combustion engine can then no longer start.
  • the main claim has the advantage that the starting process for the ⁇ internal combustion engine can be continued even if a temporary drop in voltage occurs at the starting relay.
  • This has the advantage that even with a weak battery, provided there is still enough energy available to crank the internal combustion engine, it can start. A visit to the workshop can at least be delayed.
  • the locking circuit is advantageously designed so that it works perfectly even at such low voltages at which the controlling computer can no longer be operated. In this way, for example, voltage drops of up to approximately 4 volts can be bridged indefinitely.
  • voltage drops of up to approximately 4 volts can be bridged indefinitely.
  • brief voltage drops e.g. B 100 ms and longer, also up to 0 volts be bridged, the time period being determined by the appropriate dimensioning.
  • FIG. 1 shows a block diagram of an exemplary embodiment of the invention.
  • the figure shows a computer 19 which is connected via an output STEN to a control input of an interlock circuit 1. Furthermore, the computer 19 is one
  • a voltage conditioner 21 is provided which is connected directly to the battery 20 on the input side. Your control input is connected to the Reset-IN terminal, via which it receives a corresponding signal in the event of undervoltage. It then maintains the standby supply for the locking circuit 1 and, if appropriate, the computer 19 via its output line, which is buffered with an electrolytic capacitor C.
  • the latch circuit 1 has a first NAND gate 12 and a second NAND gate 13.
  • the control input STEN is connected to an input of the first NAND gate 12, while the second input is led together with a reset line to a first input of the second NAND gate 13.
  • the reset line is fed by an AND gate 10, the two inputs (Reset-IN and Reset-OUT) of which are connected to the computer 19. Furthermore, the control input STEN is connected to the two inputs of a third NAND gate 11 operated as an inverter, the output of which is led to the second input of the second NAND gate 13. For initialization, the control input STEN is also connected to ground via a resistor R.
  • the locking circuit 1 is a
  • Memory circuit 2 which essentially has a flip-flop consisting of the two NAND gates 14 and 15 and of the RC circuit with the resistor 17 and the capacitor 18 and a coupling resistor 16.
  • the coupling resistor 16 is connected to the inverting output of the second NAND gate 13 and carries its signal through an input of the NAND gate 14.
  • the resistor 17 and the capacitor 18 are connected in parallel to ground with this input.
  • the inverting output of the first NAND gate 12 is connected to an input of the NAND gate 15, while the two free inputs of the two NAND gates 14, 15 are connected crosswise to the corresponding outputs.
  • the output of the NAND gate 15 is connected to the control input of an output stage 3 and controls the start relay 4 via its output, which in turn closes the main circuit to the starter via contacts (not shown) and, on the other hand, couples the drive pinion into the flywheel of the internal combustion engine.
  • the start relay 4 is connected to the positive pole of a battery 20. The operation of this arrangement is explained in more detail below.
  • the computer 19 controls the output stage 3 via the control input STEN of the locking circuit 1 and the memory circuit 2 in such a way that the starting relay 4 is supplied with current and actuates the starter magnet and thus closing the main circuit for actuating the starter. If, for example, the battery voltage collapses after the main circuit for the starter is switched on, the computer 19 automatically goes into a reset mode as a result of the undervoltage.
  • the undervoltage can occur for a certain period of time because, for example, the battery is undercharged or has too little capacity when it is very cold. In this case, the intermediate logic with the latch circuit 1 and the memory circuit 2 stores the current state on the
  • Control input STEN This voltage level present at the control input STEN is stored with the flip-flop 14, 15 in such a way that the output stage 3 continues to be controlled via the control input.
  • the start relay 4 thus maintains its current state.
  • the lock is only released again when the battery voltage is restored and the computer 19 has taken control of the triggering of the start relay 4. After its initialization, it creates the target state again at the STEN control input. Only then does the computer 19 reset the Reset-OUT signal, so that the output stage 3 is now controlled directly via the control input STEN.
  • the Reset-IN input is the signal which brings the computer 19 into the reset state in the event of undervoltage. Via this line, the computer 19 recognizes that there is undervoltage, and switches to reset mode to protect against malfunctions.
  • the computer reports that it is in the reset state. This signal is actively canceled by the computer based on a corresponding program. This ensures that the STEN control input is brought into the desired state before the signal is reset to the Reset-OUT output. This advantageously prevents the triggering for the starting relay 4 from being temporarily interrupted.
  • the RC circuit ensures that the memory circuit is set to an inactive state after a new connection of the battery or a change of battery in a workshop (power fail).
  • the dimensioning of the circuit is designed such that, for example, undervoltage up to 0 volts and over a period of approximately 100 ms or longer can be bridged. With these conditions, predetermined, usual test cycles can be successfully completed. Of course, with a different dimensioning, other voltage drops can also be bridged.

Abstract

The invention relates to a circuit configuration for the starter of an automotive internal combustion engine, said circuit configuration allowing the starter relay (4) to remain activated in the event of a short-term voltage dip (undervoltage of the battery). An integrated circuit memory (2) with a interlocking circuit (1) is interposed between a computer (19) and an output stage (3) that controls the starter relay (2). Upon undervoltage of the battery (20), said integrated circuit memory (2) maintains the status at a control input STEN during the voltage dip. A computer (19) that has gone back to a reset mode during the voltage dip is reactivated after termination of the voltage dip and controls the interlocking circuit (1) in such a manner that the starter relay (4) is continued to be controlled via the control input STEN. The integrated circuit memory is provided with an RC element in order to maintain a defined initial status of the flip-flop (14, 15) when the battery is re-connected.

Description

Schaltungsanordnung für einen Starter eines Kraftfahrzeug- VerbrennungsmotorsCircuit arrangement for a starter of a motor vehicle internal combustion engine
Stand der TechnikState of the art
Die Efindung geht aus von einer Schaltungsanordnung zur Steuerung eines Startrelais eines Starters für einen Kraftfahrzeug-Verbrennungsmotor nach der Gattung des Hauptanspruchs. Aus der DE 198 11 176 AI ist schon eine Anordung und ein Verfahren bekannt, bei dem ein Rechner (Steuerung) den Starterstrom für das Andrehen des Starters nach dem Schließen der Kontakte eines Startrelais steuert (Zweistufenverfahren) . Der Rechner steuert dabei die Spannung und/oder den Strom bzw. die Einschaltzeit für den Starter solange, bis der Verbrennungsmotor angesprungen j°t. Liegt jedoch ein Storungsfall des Rechners vor, der insbesondere bei einer alten und schwachen Batterie, beispielsweise auch bei tiefen Temperaturen auftreten kann, dann fuhrt dies zwangsläufig zum Abfall des Startrelais und damit zur unerwünschten Unterbrechung des Startvorganges. Der Verbrennungsmotor kann dann nicht mehr anspringen.The invention is based on a circuit arrangement for controlling a starter relay of a starter for a motor vehicle internal combustion engine according to the preamble of the main claim. From DE 198 11 176 AI an arrangement and a method are already known in which a computer (control) controls the starter current for turning on the starter after the contacts of a starter relay are closed (two-stage method). The computer controls the voltage and / or the current or the switch-on time for the starter until the internal combustion engine starts. However, if there is a fault in the computer, which can occur in particular with an old and weak battery, for example also at low temperatures, this inevitably leads to the start relay dropping and thus to the undesired interruption of the starting process. The internal combustion engine can then no longer start.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemaße Schaltungsanordnung zur Steuerung des Startrelais mit den kennzeichnenden Merkmalen des Hauptanspruchs hat Demgegenüber den Vorteil, daß der Anlaßvorgang für den \erbrennungsmotor auch dann fortgesetzt werden kann, wenn ein zeitlich begrenzter Spannungsabfall am Startrelais auftritt. Das hat den Vorteil, daß auch bei einer schwachen Batterie, sofern noch genügend Energie zum Durchdrehen des Verbrennungsmotors zur Verfugung steht, dieser anspringen kann. Ein Werkstattbesuch kann zumindest verzögert werden.The circuit arrangement according to the invention for controlling the start relay with the characteristic features of In contrast, the main claim has the advantage that the starting process for the \ internal combustion engine can be continued even if a temporary drop in voltage occurs at the starting relay. This has the advantage that even with a weak battery, provided there is still enough energy available to crank the internal combustion engine, it can start. A visit to the workshop can at least be delayed.
Durch die in den abhangigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Schaltungsanordnung möglich. Besonders vorteilhaft ist, daß beim Auftreten eines Spannungseinbruchs die Speicherschaltung mit dem Flip-Flop den momentanen logischen Schaltzustand des Startrelais einfriert. Denn ein Spannungseinbruch kann dazu fuhren, daß der steuernde Rechner nicht mehr ausrechend mit Energie versorgt werden kann. In diesem Fall schaltet sich der Rechner in den Reset- Modus, um Fehlsteuerungen zu vermeiden. Erst wenn dieThe measures listed in the dependent claims allow advantageous developments and improvements of the circuit arrangement specified in the main claim. It is particularly advantageous that when a voltage dip occurs, the memory circuit with the flip-flop freezes the instantaneous logic switching state of the start relay. Because a voltage drop can mean that the controlling computer can no longer be supplied with sufficient energy. In this case, the computer switches to reset mode to avoid incorrect controls. Only when the
Unterspannung beseitigt und der Rechner wieder die volle Kontrolle nach dem Spannungseinbruch übernommen hat, schaltet er wieder die Verriegelungsschaltung inaktiv und kann somit den normalen Steuermodus für den Betrieb des Startrelais fortsetzen.Undervoltage removed and the computer has taken full control again after the voltage drop, it switches the locking circuit inactive again and can thus continue the normal control mode for the operation of the start relay.
Die Verriegelungsschaltung ist vorteilhaft so ausgebildet, das sie auch bei solchen niedrigen Spannungen, bei denen der Steuernde Rechner nicht mehr betrieben werden kann, einwandfrei funktioniert. Auf diese Weise können beispielsweise Spannungseinbruche beispielsweise bis ca 4 Volt zeitlich unbegrenzt überbrückt werden. Durch Pufferung der Versorgungsspannung beispielsweise mit Elektrolytkondensatoren können kurzzeitige Spannungseinbruche, z. B 100 ms und langer, auch bis 0 Volt überbrückt werden, wobei die Zeitdauer durch die einsprechende Dimensionierung bestimmt wird.The locking circuit is advantageously designed so that it works perfectly even at such low voltages at which the controlling computer can no longer be operated. In this way, for example, voltage drops of up to approximately 4 volts can be bridged indefinitely. By buffering the supply voltage, for example with electrolytic capacitors, brief voltage drops, e.g. B 100 ms and longer, also up to 0 volts be bridged, the time period being determined by the appropriate dimensioning.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung naher erläutert. Die Figur zeigt ein Blockschaltbild eines Ausfuhrungsbeispiels der Erfindung.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. The figure shows a block diagram of an exemplary embodiment of the invention.
Beschreibungdescription
Die Figur zeigt einen Rechner 19, der über einen Ausgang STEN mit einem Steuereingang einer Verriegelungsschaltung 1 verbunden ist. Desweiteren ist der Rechner 19 über einenThe figure shows a computer 19 which is connected via an output STEN to a control input of an interlock circuit 1. Furthermore, the computer 19 is one
Reset-IN - Eingang und einem weiteren Ausgang Reset-OUT mit der Verriegelungsschaltung 1 verbunden.Reset-IN - input and another output Reset-OUT connected to the interlock circuit 1.
Um die Übersicht zu gewahren, sind nur die Schaltungsblocke dargestellt, die im einzelnen die wesentlichen Funktionen wiedergeben .In order to maintain an overview, only the circuit blocks are shown that detail the essential functions.
Ergänzend wird noch darauf hingewiesen, daß zur Aufrechterhaltung der Funktion der Verriegelungsschaltung wahrend des Spannungseinbruchs eine Spannungsaufbereitung 21 vorgesehen ist, die eingangsseitig direkt mit der Batterie 20 verbunden ist. Ihr Steuereingang ist mit der Klemme Reset-IN verbunden, über die sie bei Unterspannung ein entsprechendes Signal erhalt. Sie erhalt dann über ihre Ausgangsleitung, die mit einem Elektrolyt-Kondensator C gepuffert ist, die Standby-Versorgung für die Verriegelungsschaltung 1 und gegebenenfalls den Rechner 19 aufrecht. Die Verriegelungsschaltung 1 weist ein erstes NAND-Gatter 12 und ein zweites NAND-Gatter 13 auf. Der Steuereingang STEN ist mit einem Eingang des ersten NAND-Gatters 12 verbunden, wahrend der zweite Eingang zusammen mit einer Reset-Leitung auf einen ersten Eingang des zweiten NAND-Gatters 13 gef hrt ist. Die Reset-Leitung wird dabei von einem AND-Gatter 10 gespeist, dessen beide Eingange (Reset-IN und Reset-OUT) mit dem Rechner 19 verbunden sind. Desweiteren ist der Steuereingang STEN mit den beiden Eingangen eines als Inverter betrieben dritten NAND-Gatters 11 verbunden, dessen Ausgang auf den zweiten Eingang des zweiten NAND-Gatters 13 gefuhrt ist. Zur Initialisierung ist noch der Steuereingang STEN über einen Widerstand R auf Masse gelegt.In addition, it is pointed out that in order to maintain the function of the locking circuit during the voltage dip, a voltage conditioner 21 is provided which is connected directly to the battery 20 on the input side. Your control input is connected to the Reset-IN terminal, via which it receives a corresponding signal in the event of undervoltage. It then maintains the standby supply for the locking circuit 1 and, if appropriate, the computer 19 via its output line, which is buffered with an electrolytic capacitor C. The latch circuit 1 has a first NAND gate 12 and a second NAND gate 13. The control input STEN is connected to an input of the first NAND gate 12, while the second input is led together with a reset line to a first input of the second NAND gate 13. The reset line is fed by an AND gate 10, the two inputs (Reset-IN and Reset-OUT) of which are connected to the computer 19. Furthermore, the control input STEN is connected to the two inputs of a third NAND gate 11 operated as an inverter, the output of which is led to the second input of the second NAND gate 13. For initialization, the control input STEN is also connected to ground via a resistor R.
Der Verriegelungsschaltung 1 nachgeschaltet ist eineThe locking circuit 1 is a
Speicherschaltung 2, die im wesentlichen ein Flip-Flop bestehend aus den beiden NAND-Gattern 14 und 15 sowie aus der RC-Schaltung mit dem Widerstand 17 und dem Kondensator 18 und einem Koppelwiderstand 16 aufweist. Der Koppelwiderstand 16 ist an den invertierenden Ausgang des zweiten NAND-Gatters 13 angeschlossen und fuhrt dessen Signal über einen Eingang des NAND-Gatters 14. Der Widerstand 17 sowie der Kondensator 18 sind diesem Eingang gegen Masse parallel geschaltet. Der invertierende Ausgang des ersten NAND-Gatters 12 ist dagegen auf einen Eingang des NAND-Gatters 15 geschaltet, wahrend die zwei freien Eingange der beiden NAND-Gatter 14, 15 auf die entsprechenden Ausgange kreuzweise geschaltet sind. Der Ausgang des NAND- Gatters 15 ist auf den Steuereingang einer Endstufe 3 geschaltet und steuert über deren Ausgang das Startrelais 4, das wiederum über nicht dargestellte Kontakte einerseits den Hauptstromkreis zum Starter schließt und andererseits das Antriebsritzel in das Schwungrad des Verbrennungsmotors einkoppelt. Das Startrelais 4 ist zu diesem Zweck mit dem Pluspol einer Batterie 20 verbunden. Im folgenden wird die Funktionsweise dieser Anordnung naher erläutert .Memory circuit 2, which essentially has a flip-flop consisting of the two NAND gates 14 and 15 and of the RC circuit with the resistor 17 and the capacitor 18 and a coupling resistor 16. The coupling resistor 16 is connected to the inverting output of the second NAND gate 13 and carries its signal through an input of the NAND gate 14. The resistor 17 and the capacitor 18 are connected in parallel to ground with this input. The inverting output of the first NAND gate 12, however, is connected to an input of the NAND gate 15, while the two free inputs of the two NAND gates 14, 15 are connected crosswise to the corresponding outputs. The output of the NAND gate 15 is connected to the control input of an output stage 3 and controls the start relay 4 via its output, which in turn closes the main circuit to the starter via contacts (not shown) and, on the other hand, couples the drive pinion into the flywheel of the internal combustion engine. For this purpose, the start relay 4 is connected to the positive pole of a battery 20. The operation of this arrangement is explained in more detail below.
Im normalen Betriebsmodus, wenn die volle Batteriespannung der Batterie 20 zur Verfugung steht, steuert der Rechner 19 über den Steuereingang STEN der Verriegelungsschaltung 1 und die Speicherschaltung 2 die Endstufe 3 derart, daß das Startrelais 4 mit Strom versorgt wird und den Einruckmagnet des Starters betätigt und somit den Hauptstromkreis für die Betätigung des Starters schließt. Bricht beispielsweise nach dem Anschalten des Hauptstromkreises für den Starter die Batteriespannung zusammen, dann geht infolge der Unterspannung der Rechner 19 automatisch in einen Reset- Modus. Die Unterspannung kann für einen gewissen Zeitraum auftreten, weil beispielsweise die Batterie zu schwach geladen oder eine zu geringe Kapazität bei großer Kalte aufweist. In diesem Fall speichert die zwischengeschaltete Logik mit der Verriegelungsschaltung 1 und der Speicherschaltung 2 den momentanen Zustand an demIn the normal operating mode, when the full battery voltage of the battery 20 is available, the computer 19 controls the output stage 3 via the control input STEN of the locking circuit 1 and the memory circuit 2 in such a way that the starting relay 4 is supplied with current and actuates the starter magnet and thus closing the main circuit for actuating the starter. If, for example, the battery voltage collapses after the main circuit for the starter is switched on, the computer 19 automatically goes into a reset mode as a result of the undervoltage. The undervoltage can occur for a certain period of time because, for example, the battery is undercharged or has too little capacity when it is very cold. In this case, the intermediate logic with the latch circuit 1 and the memory circuit 2 stores the current state on the
Steuereingang STEN. Dieser am Steuereingang STEN anstehende Spannungspegel wird mit dem Flip-Flop 14, 15 derart gespeichert, daß die Endstufe 3 weiterhin über den Steuereingang angesteuert bleibt. Das Startrelais 4 behalt somit seinen aktuellen Zustand bei. Die Verriegelung wird erst wieder aufgehoben, wenn die Batteriespannung wieder ansteht und der Rechner 19 die Kontrolle über die Ansteuerung des Startrelais 4 übernommen hat. Nach seiner Initialisierung legt er an den Steuereingang STEN wieder den Sollzustand an. Erst danach nimmt der Rechner 19 das Signal Reset-OUT zurück, sodaß nun die Endstufe 3 wieder direkt über den Steuereingang STEN angesteuert wird. Der Eingang Reset-IN ist das Signal, das bei Unterspannung den Rechner 19 in den Reset-Zustand bringt. Über diese Leitung erkennt also der Rechner 19, daß eine Unterspannung vorliegt, und schaltet sich zum Schutz gegen Fehlfunktionen in den Reset- Modus .Control input STEN. This voltage level present at the control input STEN is stored with the flip-flop 14, 15 in such a way that the output stage 3 continues to be controlled via the control input. The start relay 4 thus maintains its current state. The lock is only released again when the battery voltage is restored and the computer 19 has taken control of the triggering of the start relay 4. After its initialization, it creates the target state again at the STEN control input. Only then does the computer 19 reset the Reset-OUT signal, so that the output stage 3 is now controlled directly via the control input STEN. The Reset-IN input is the signal which brings the computer 19 into the reset state in the event of undervoltage. Via this line, the computer 19 recognizes that there is undervoltage, and switches to reset mode to protect against malfunctions.
Mit dem Signal Reset-OUT meldet der Rechner, daß er sich im Reset-Zustand befindet. Dieses Signal wird aktiv aufgrund eines entsprechenden Programmes durch den Rechner zurückgenommen. Damit ist sichergestellt, daß der Steuereingang STEN in den gewünschten Zustand gebracht wird, bevor das Signal an den Ausgang Reset-OUT zurückgenommen wird. Dadurch wird vorteilhaft eine zwischenzeitliche Unterbrechung der Ansteuerung für das Startrelais 4 unterbunden.With the Reset-OUT signal, the computer reports that it is in the reset state. This signal is actively canceled by the computer based on a corresponding program. This ensures that the STEN control input is brought into the desired state before the signal is reset to the Reset-OUT output. This advantageously prevents the triggering for the starting relay 4 from being temporarily interrupted.
Mit der RC-Beschaltung wird sichergestellt, daß die Speicherschaltung nach einem Neuanschluß der Batterie oder einem Wechsel der Batterie in einer Werkstatt (power fail) das Relais in einen inaktiven Zustand gesetzt wird.The RC circuit ensures that the memory circuit is set to an inactive state after a new connection of the battery or a change of battery in a workshop (power fail).
Die Dimensionierung der Schaltung ist derart ausgelegt, daß beispielsweise Unterspannungen bis zu 0 Volt und über einer Zeitspanne von ca. 100 ms oder langer überbrückt werden können. Mit diesen Bedingungen können vorgegebene, übliche Prufzyklen erfolgreich absolviert werden. Naturlich sind bei einer anders ausgelegten Dimensionierung auch andere Spannungseinbruche uberbruckbar . The dimensioning of the circuit is designed such that, for example, undervoltage up to 0 volts and over a period of approximately 100 ms or longer can be bridged. With these conditions, predetermined, usual test cycles can be successfully completed. Of course, with a different dimensioning, other voltage drops can also be bridged.

Claims

Ansprüche Expectations
1. Schaltungsanordnung zur Steuerung eines Startrelais eines Starters für einen Kraftfahrzeug-Verbrennungsmotor, mit einer Batterie (20), die mit dem Startrelais (4) elektrisch verbunden ist und mit einem Rechner (19) , der im Steuerkreis des Startrelais (4) angeordnet ist, dadurch gekennzeichnet, daß zwischen dem Rechner (19) und dem Startrelais (4) eine Speicherschaltung (2) angeordnet ist, die wahrend einer zeitlich begrenzten Unterspannung der Batterie (20) zur Aufrechterhaltung des vorhandenen Steuersignales (STEN) für das Startrelais (4) ausgebildet ist.1. Circuit arrangement for controlling a starter relay of a starter for a motor vehicle internal combustion engine, with a battery (20) which is electrically connected to the starter relay (4) and with a computer (19) which is arranged in the control circuit of the starter relay (4) , characterized in that a memory circuit (2) is arranged between the computer (19) and the start relay (4) which, during a temporary undervoltage in the battery (20), for maintaining the existing control signal (STEN) for the start relay (4) is trained.
2. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Speicherschaltung (2) ein Flip- Flop (14, 15) aufweist.2. Circuit arrangement according to claim 1, characterized in that the memory circuit (2) has a flip-flop (14, 15).
3. Schaltungsanordnung nach Anspruch 2, dadurch gekennzeichnet, daß das Flip-Flop (14, 15) mittels einer RC-Schaltung (17, 18) derart setzbar ist, daß das Startrelais (4) beim Wiederanlegen der Batteriespannung (nach einem ,power failΛ) in den inaktiven Zustand gesetzt wird.3. Circuit arrangement according to claim 2, characterized in that the flip-flop (14, 15) by means of an RC circuit (17, 18) can be set such that the start relay (4) when the battery voltage is reapplied (after a, power fail Λ ) is set to the inactive state.
4. Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwischen dem Rechner (19) und der Speicherschaltung (2) eine Verriegelungsschaltung (1) angeordnet ist. 4. Circuit arrangement according to one of the preceding claims, characterized in that a locking circuit (1) is arranged between the computer (19) and the memory circuit (2).
5. Schaltungsanordnung nach Anspruch 4, dadurch gekennzeichnet, daß die Verriegelungsschaltung (1) den momentanen logischen Zustand an einem Steuereingang5. Circuit arrangement according to claim 4, characterized in that the locking circuit (1) the current logic state at a control input
(STEN) erfaßt und diesen mit Hilfe der Speicherschaltung (2) speichert.(STEN) detected and saved using the memory circuit (2).
6. Schaltungsanordnung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Verriegelungsschaltung (1) ausgebildet ist, die Ansteuerung für das Startrelais (4) aufrecht zu erhalten, wenn sich der Rechner (19) in einem6. Circuit arrangement according to claim 4 or 5, characterized in that the locking circuit (1) is designed to maintain the control for the start relay (4) when the computer (19) in one
Reset-Modus befindet.Reset mode.
7. Schaltungsanordnung nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß der Rechner (19) die Verriegelungsschaltung (1) inaktiv schaltet, wenn die7. Circuit arrangement according to one of claims 4 to 6, characterized in that the computer (19) switches the locking circuit (1) inactive when the
Unterspannung der Batterie (20) beendet ist.Low voltage of the battery (20) has ended.
8. Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Rechner (19) ein Programm aufweist, mit dem die Verriegelungsschaltung8. Circuit arrangement according to one of the preceding claims, characterized in that the computer (19) has a program with which the locking circuit
(1) und/oder die Speicherschaltung (2) steuerbar sind.(1) and / or the memory circuit (2) are controllable.
9. Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Verriegelungs- und Speicherschaltung (1, 2) einen Spannungseinbruch bis ca. 0 Volt überbrücken.9. Circuit arrangement according to one of the preceding claims, characterized in that the locking and storage circuit (1, 2) bridge a voltage drop to about 0 volts.
10. Schaltungsanordnung nach Anspruch 9, dadurch gekennzeichnet, daß Spannungen bis ca. 4 V zeitlich unbegrenzt und Spannungen unter 4 V zeitlich begrenzt uberbruckbar sind. 10. Circuit arrangement according to claim 9, characterized in that voltages up to approximately 4 V can be bridged for an unlimited time and voltages below 4 V can be bridged for a limited time.
EP01911355A 2000-02-10 2001-01-17 Circuit configuration for the starter of an automotive internal combustion engine Expired - Lifetime EP1169569B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10005778A DE10005778A1 (en) 2000-02-10 2000-02-10 Circuit arrangement for control of starter relay of starter for car's IC engine has between computer and starter relay, storage circuit which is designed for maintenance of existing control signal for starter relay
DE10005778 2000-02-10
PCT/DE2001/000173 WO2001059294A1 (en) 2000-02-10 2001-01-17 Circuit configuration for the starter of an automotive internal combustion engine

Publications (2)

Publication Number Publication Date
EP1169569A1 true EP1169569A1 (en) 2002-01-09
EP1169569B1 EP1169569B1 (en) 2005-04-20

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ID=7630384

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01911355A Expired - Lifetime EP1169569B1 (en) 2000-02-10 2001-01-17 Circuit configuration for the starter of an automotive internal combustion engine

Country Status (5)

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US (1) US6795766B2 (en)
EP (1) EP1169569B1 (en)
JP (1) JP2003522883A (en)
DE (2) DE10005778A1 (en)
WO (1) WO2001059294A1 (en)

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Also Published As

Publication number Publication date
DE50105936D1 (en) 2005-05-25
DE10005778A1 (en) 2001-08-16
WO2001059294A1 (en) 2001-08-16
US20020183918A1 (en) 2002-12-05
US6795766B2 (en) 2004-09-21
JP2003522883A (en) 2003-07-29
EP1169569B1 (en) 2005-04-20

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